Cuantificación del agua en la elaboración de cuero mediante la huella hídrica
Keywords:
curtiembres, efluentes, huella hídrica, procesoAbstract
The aim of this work was to quantify the water invol ved during natural leather production by the water footprint (WF). A local tannery was analyzed, where four main steps were identified: beamhouse, tan ning, retanning and finishing operations. The WFtotal was calculated for each operation step, as the sum of the WFgrey , WFblue and WFindirect . For WFgrey , the bio chemical oxygen demand (BOD) was used as the main parameter for effluent quality measurement; for WFblue , water evaporated during the process was considered; for WFindirect , equipment and electricity footprints were used. In WF terms, 39 liters of water are needed to produce 1 kg of leather (WFgrey = 36 l/kg, WFblue = 2.6 l/kg, WFindirect = 0.4 l/kg), when the value without considering the WF calculation is 29 l/kg leather. WFgrey contributed the most to the total (92%). The beamhouse was the step with highest water use (WFgrey = 30.7 l/kg), generating effluents with high BOD values.
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